Basic properties of refractory material for steel making

• 
  Refractory materials for converter

The furnace cap, tapping converter mouth, before and after the surface, the weld pool and the bottom are made of magnesia carbon brick; the trunnion and the slag line part using high strength magnesia carbon brick. Magnesia carbon brick in MgO content is 70 ~ 75%, the content of graphite is 16 ~ 20%, the bulk density is 2.8 ~ 2.9g/cm3,

the compressive strength of 25 ~ 30MPa.High strength magnesia carbon brick, with the elements of magnesia carbon brick, but the compressive strength of 30 ~ 42MPa.

• With refractory furnace

Furnace hearth, furnace slope and the molten pool for magnesia overall tie, or the use of magnesia carbon brick and tar bonded brick; hot and slag line area, the use of high-quality magnesia carbon brick; the furnace door on both sides and tapping El for magnesia brick, magnetite chrome brick; furnace cover for high alumina bricks or high alumina unfired brick.

• Refractories for UHP EAF

Ultra high power permanent lining for magnesium stone, door jamb magnesia chrome brick, slag line brick, hot spots for magnesia carbon brick, wall of the furnace for magnesia carbon brick, eccentric bottom and pool for magnesia brick, tapping into magnesia carbon brick, high alumina brick furnace cover, tapping hole filling is High-speed Rail dolomite filling material.

• Refractory materials used in open hearth furnace
  

The working conditions of various steel furnace can be seen, refractory material working environment is very bad, therefore, no matter what the use of refractory material, must have the following properties:

1. High temperature resistant has high refractoriness.
2. Erosion and erosion resistance to high temperature of molten steel and slag.
3. The steelmaking furnace for intermittent operation, requirements of the refractory material has good thermal shock resistance and spalling resistance.
4. Has high mechanical strength, impact can withstand the tilting and loading charge without damage.